Lenovo's Yoga Book is possibly the most unique Windows 10 tablet yet. It's a full Windows 10 machine, with a 10.1-inch HD IPS screen powered by an Intel Atom processor, but it's the keyboard — or the lack thereof — that really turns heads.

It opens and folds around the stunning watchband hinge we've come to love from other Lenovo Yoga convertibles, but instead of revealing a traditional keyboard you're greeted by the touch-sensitive Halo Keyboard. No physical keys, just a big sheet of glass. With the tap of a button the light-up keys disappear and you get a full touch panel on which you can write and draw with the included stylus, or you can put a pad of paper over top of that and write with ink and see it transcribed onto the display.

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